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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR
PURPOSE.
Module Name:
ToneGenerator.h
Abstract:
Declaration of sine wave generator for ACX driver samples.
--*/
#pragma once
#define _USE_MATH_DEFINES
#include <math.h>
#include <limits.h>
class ToneGenerator
{
public:
DWORD m_Frequency;
WORD m_ChannelCount;
WORD m_BitsPerSample;
DWORD m_SamplesPerSecond;
double m_Theta;
double m_SampleIncrement;
bool m_Mute;
BYTE* m_PartialFrame;
DWORD m_PartialFrameBytes;
DWORD m_FrameSize;
public:
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
ToneGenerator();
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
~ToneGenerator();
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
NTSTATUS
Init
(
_In_ DWORD ToneFrequency,
_In_ PWAVEFORMATEXTENSIBLE WfExt
);
__drv_maxIRQL(DISPATCH_LEVEL)
VOID
GenerateSine
(
_Out_writes_bytes_(BufferLength) BYTE *Buffer,
_In_ size_t BufferLength
);
__drv_maxIRQL(PASSIVE_LEVEL)
PAGED_CODE_SEG
VOID
SetMute
(
_In_ bool Value
)
{
PAGED_CODE();
m_Mute = Value;
}
private:
__drv_maxIRQL(DISPATCH_LEVEL)
VOID InitNewFrame
(
_Out_writes_bytes_(FrameSize) BYTE* Frame,
_In_ DWORD FrameSize
);
};
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